Storage Cleaner for Outlook & OneDrive

See what's filling your Microsoft storage and clean it up: large Outlook attachments, big OneDrive files, and exact duplicates.

Microsoft storage full? Storage Cleaner helps you free up space across Outlook and OneDrive before you pay for more storage. Scan locally. Review first. Clean up only what you approve. Storage Cleaner scans your Outlook mailbox, your OneDrive, and your Microsoft storage quota, then ranks cleanup opportunities by how much space they can free. Everything runs in your own browser, on your device. Your emails and files are not uploaded to our servers. 🔎 WHAT IT FINDS 📧 Outlook Find large attachments, old mail with attachments, drafts with attachments, promotions and social mail, junk email, and Deleted Items. ☁️ OneDrive Find large files, large videos, photos and screenshots, duplicate files, old file versions, and the recycle bin. ⚙️ CLEAN AT YOUR OWN PACE Choose how deep to scan: • Quick: older than 6 months • Standard: older than 3 months • Deep: any age You can also set your own age floor: no minimum, older than 3 months, older than 6 months, or older than 1 year. ✅ YOU STAY IN CONTROL • Nothing is moved or deleted without your review and approval • Flagged and high-importance mail is always excluded • Add protected keywords, and matching items are skipped • Protect specific senders so their mail is never touched • Files with personal-looking names are highlighted and left unchecked • Reversible cleanups move items to Deleted Items or the OneDrive recycle bin first, restorable for up to 30 days • Permanent actions, like emptying Deleted Items or removing old file versions, are clearly labeled before you confirm 🔒 PRIVATE BY DESIGN • Runs in your browser, on your device • Requests go directly between your browser and Microsoft • Your emails and files are not uploaded to our servers • No new account is required • You can revoke Microsoft access anytime The scan is free. See what you can clean up before you decide anything: https://cleanmicrosoftstorage.com Storage Cleaner is an independent extension and is not affiliated with, endorsed by, or sponsored by Microsoft. Microsoft, Outlook, and OneDrive are trademarks of the Microsoft group of companies.